Question

Soil is a complex mixture of minerals, organic matter, air and water in which percentages?

Answer 1

average soil composition is:-

Air - 25%

Water- 25%

Minerals- 45%

Organic matter- 5%

Hydrolysis and oxidation are two major types of chemical weathering processes.

So option 2 is correct.

When quartz weathers it produces silica grains.

So option 1 is correct.